Derrick-top assembly



July 1.9, 1927.

C. W. LYNCH DERRICK TOP ASSEMBLY C. W. LYNCH DERRI CK TOP AS SEMBLY Filed Ausl. 18. 1926 2 Sheets-Sheet '2 Qi@ v O Z n INVENTOR. f C( WCL/lumai@ 1%)9/562 BY a W l I l ATTORNEYS.

Patented `luly 19, 1927.

siren srA'rEs vPArENr ol-"Fics,

CHARLES W. LYNCH, OF PERRY, OKLAHOMA, ASSIGNOR TO PICKERING LUMBER COM- PANY, OF KANSAS CITY, MISSOURI, A CORPORATION OF DELAWARE.

DERRICK-TOP ASSEMBLY.

Applcaton'led August 1 8, 1926. Serial No; 129,877.

This invention relates to tops for compression type wood derricks, and my object is to produce an efficient and safe derrick at less assembly cost than the conventional derrick of this type. W ith the .type in general use, it is customary to provide top leg sections of materially larger cross section than the other sections of the legs, to allow for cutting and fitting for the accommodation of the top assembly, without undue weakening of the general structure, the use of enlarged leg members being also necessary, as with such structures it is impracticable to use girts as close to the top of the leg members as desirable to provide maximum strength and rigidity. Y

VMy object is to provide a construction which not only permits girts to be employed at the upper extremities of the legs but also permits of the use of topmost leg members 'of the same cross sectional area and form as the underlying leg sections without any sacrifice of strength or rigidity. My improved construction also provides for the use of top elements, known in the oil field as deadwoods and crossheads or headers, with which no care need be exercised or time wasted in the setting of such elements. Furthermore the improvement makes practical the use ot' -beam headers to sustain the load and of flanged plates to transmit trie load to and upon the end extremities of the legs and guard against separating or spreading movement of the headers and dea'dwoods, and thus provide for an equitable distrbution of the load on the entire derrick in a simple and eflicient manner.

Vith the object set forth in view, the invention consists in certain novel and useful features of construction and organization as hereinafter described and claimed; and in order that it may be fully understood, reference is to be had to the accompanying drawings, in which:

Figure l is a top view of the upper part of a derrick embodying the invention.

Figure 2 is a section on the line II--H of Figure l.

Figure 3 is a section on the line III-HI of Figure l. i

Figure 4 is a side elevation of the upper end of the derrick.

Figure 5 is an enlarged vertical section o the line V-V of Figure l.

one of the corner brackets employed in the support and assembly of the headers and deadwoods.

In the said drawings, where like reference characters identify corresponding parts in all of the figures, l indicates derrick legs,

2 horizontal girts extending from one leg to another, and 3 are the customary brackets Aused for connecting the adjacent ends of superposed leg members together, it being understood the legs are composed of a series of members arranged end to end, as customary in this type ofderrick, the ends of the respective girts being bolted or otherwise secured to such brackets, it being noted in this instance that the leg members extending upward from brackets 3 are shown as of the same cross sectional area as where extending downward from said brackets, the usel of relatively light topmost leg members being practicable because they are not weakened by lcutting or recessiug and because they are braced at their upper extremities by girts 2 abutting opposite leg members and secured thereto through the medium of angle brackets 4 secured to the upper ends ofthe leg members and projecting upward therefrom.L

Each 0f the angle brackets 4 accommodates a bearing plate 5 resting flatly upon an underlying leg, and the said plates are loosely connected to the respective brackets 4, as shown in Figure 5, to guard against misplacement, as the plates will operate eificiently if merely placed upon the ends of the leg members without being fastened in any way to the brackets 4. The plates are provided at their outer margins with flanges 6, and form supports for parallel I-beam headers 7, the headers bearing at the outer edges of their base flanges against the adjacent plate flanges, andthe ends of the headers bearing again-st the other flanges of the same plates. The headers are thus prevented from endwise movement and from sliding outwardly. To prevent them from sliding inwardly and from tilting, and from moving upwardly, bolts 8 connect them through the web portions, with the brackets 4, asy shown most clearly in Figure 2. They are also tied together and braced apart by a pair of deadwoods, each of which is arranged horizontally in the same plane as but crosswise with respect to the headers, and are tapered at the ends of their upper and lower sides so as to fit between the inwardly projecting lianges of the headers and bear against the Webs thereof, and said deadwoods are retained in position by bolts l Which connect them with the corner brackets t. It will be noted, at'tliis point,- that the I-beains Where used on large deiricks oit this characterand Weighing several hundred pounds, can be readily placed in position by the usual gin pole apparatus (not shown) Without the er? ercise of any particular care, because either side of the I-beams may be .the top or bottom, andthe same statement applies to they heavy deadwoods, as they will beso made that the holes therein Will register With the holes of the corner brackets l design-edtor the reception of bolts l0, regardless of which beveled side is disposeduppermost. To still further stitlenA and strengthen the structure, crossed turn-buckle tie rods connect the corner brackets l With they underlyingsetof corner brackets 3, the upper end ot the said crossedv braces being preferably hooked as at l2 into openings in brackets fl, the saine openings of saidv brackets also torniing an-V chorage points for theoppositeeiids ot horizontal turn-buckle braces 13, as shownfclearly by Figures l and 4t.

It will thus be seen that; the `upper ex-k tremities of the legs ot' the dei-rick are etli-` ciently braced irom twistingy and other movements, and that the saine statement ap-. plies to the corner brackets 4f, and thatthe headers and deadwoods are secured in place strongly and economically.

From the above description, it will be `ia-pparent that I have produced a top` assembly f 'foi'wvood derrioks oit the compression type which possesses the features of advantage set 1forth as desirable in the statement yof the object of the invention, and itis to be understood that changes properly` 'lallingWithin` the principle of construction andI mode otoperation involved, may be made Without dey ing.-.at right angles to and labut-ting said I, beams, means torsecuring lthe-l-bearns and. deadxvoods to said corner brackets, and coin-V pressionn'ieansor bracing the plates, head-1 ers anddeadwoods against relative spread-- ing movement.

2.1The combination in a derrick having four legs, ot' angle plate bracket-s secured to said legs at their uppei extremities and proa` .Jecting beyond suoli extremities, angle brac/k*` ets secured to said legs in aloWer plane than the iirst named brackets, horizontal girts between opposite legs and .fastened to brackets iii corresponding ,horizontaly planes, crossed braces connecting the lower set van'diipper-setV of brackets, horizontal braces also connecting the upper set of brackets, plates litting in said Vbrackets and resting upon said legs, -a pai-i' ot parallel: I-beams littingv in a pair ofsaid topniost brackets and restingupona pair ot saidy plates,and a pair otdeadwoodsk extending at riglitiangles vto said .I-beains and bearing at their ends against-the Web*r portions lof said I-beanis, .and their upper and lower sides fitting against the adjacentV vflanges ot the I-beains, andA meansfor 'fastening the Lbeams anddeadwoods Vto the said i uppermost s-et ot brackets.

In Witness whereof I hereunto aiiix my signature Y CHARLES W. LYNCH.. 

